4,4'-(3-Phenyl-1H-pyrazole-1,5-diyl)dianiline CAS 138737-84-5

Purity 97%+In StockPharmaceutical Standards
CAS No.138737-84-5
Molecular FormulaC21H18N4
Molecular Weight326.39 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4,4'-(3-Phenyl-1H-pyrazole-1,5-diyl)dianiline CAS 138737-84-5 chemical structure

Description

4,4'-(3-Phenyl-1H-pyrazole-1,5-diyl)dianiline (C21H18N4) contains a nitrogen-containing heterocyclic scaffold, a nitrile group. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

4,4'-(3-Phenyl-1H-pyrazole-1,5-diyl)dianiline (CAS 138737-84-5), molecular formula C21H18N4 and molecular weight 326.39 g/mol, is a CATO reference standard with documented purity and traceability.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC21H18N4
Molecular Weight326.39 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)15.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1996
Nitrogen Atoms4

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